Present participle; Past participle - coaling - coaled Present - coal - coal - coals - coal - coal - coal Past - coaled - coaled - coaled - coaled - coaled - coaled Future - will coal - will coal - will coal - will coal - will coal - will coal Present conditional - would coal - would coal - would coal - would coal - would coal - would coal Present Perfect - have coaled - have coaled - has coaled - have coaled - have coaled - have coaled Past Perfect - had coaled - had coaled - had coaled - had coaled - had coaled - had coaled Future Perfect - will have coaled - will have coaled - will have coaled - will have coaled - will have coaled - will have coaled Past conditional - would have coaled - would have coaled - would have coaled - would have coaled - would have coaled - would have coaled Imperative - - - coal - - - - - - - -